我想显示一个列表(在磁贴布局中,但我认为这不会改变任何东西)并打开我长按的磁贴的编辑窗口(即按下至少 1 秒)。计时器启动正常,并且 longPressHandler 事件在 1 秒后正确调用,但是,选择的对象是我触摸的上一个对象。
例如,假设我点击对象 A,然后长按对象 B:longPressHandler 将在编辑窗口中“打开”对象 A。我已经调试过,我看到我的 List 的 SelectedItem 属性仅在我结束长按后更新(例如,在我拿起手指或松开鼠标按钮后)。有没有办法打开当前选中的项目?
相关动作脚本:
private var longPressTimer:Timer = new Timer(1000,1);
private function startLongPressMouse(event:MouseEvent):void {
startLongPressTimer();
list.addEventListener(MouseEvent.MOUSE_MOVE, endLongPressMouse);
}
private function endLongPressMouse(event:MouseEvent):void {
stopLongPressTimer();
enableClick();
list.removeEventListener(MouseEvent.MOUSE_MOVE, endLongPressMouse);
}
private function startLongPress(event:TouchEvent):void {
startLongPressTimer();
list.addEventListener(TouchEvent.TOUCH_MOVE, endLongPress);
}
private function endLongPress(event:TouchEvent):void {
stopLongPressTimer();
enableClick();
list.removeEventListener(TouchEvent.TOUCH_MOVE, endLongPress);
}
private function startLongPressTimer():void {
longPressTimer.start();
longPressTimer.addEventListener(TimerEvent.TIMER_COMPLETE, longPressHandler);
}
protected function disableClick():void {
trace("disable click");
list.removeEventListener(MouseEvent.CLICK, regularClickHander);
}
public function enableClick():void {
list.callLater(list.addEventListener, [MouseEvent.CLICK, regularClickHander]);
}
public function resetListSelection():void {
list.selectedIndex = -1;
list.validateDisplayList();
}
private function stopLongPressTimer():void{
longPressTimer.stop();
longPressTimer.reset()
}
public function longPressHandler(event:TimerEvent):void{
disableClick();
stopLongPressTimer();
lblD.text = "Long Press Detected on: " + list.selectedItem.className;
}
相关MXML:
<s:List id="list" dataProvider="{grades}" touchBegin="startLongPress(event)" touchEnd="endLongPress(event)"
mouseDown="startLongPressMouse(event)" mouseUp="endLongPressMouse(event)"
labelField="name"
left.landscape="10" right.landscape="20" top.landscape="350" bottom.landscape="20"
left.portrait="20" right.portrait="20" top.portrait="350" bottom.portrait="20">
<s:itemRenderer>
<fx:Component>
<s:ItemRenderer width="100%" height="200">
<s:Label text="{data.className}" top="30" horizontalCenter="0" color="#646464"/>
<s:Label text="{data.credits}" top="50" horizontalCenter="0" color="#646464" fontSize="14"/>
<s:Label text="{data.grade}" top="100" horizontalCenter="0" color="#646464" fontSize="14"/>
</s:ItemRenderer>
</fx:Component>
</s:itemRenderer>
<s:layout>
<s:TileLayout requestedColumnCount="3" requestedColumnCount.landscape="4" columnAlign="justifyUsingWidth"/>
</s:layout>
</s:List>
我将 longPressHandler 更改为仅显示所选项目的名称,而不是打开编辑窗口。
如果您需要更多信息,请告诉我。预先感谢您的帮助!